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The ZF lenses description:
"ZF lenses provide Nikon F-mount cameras with the creative potential and phototechnical performance available
so far only in the Contax system. In addition, ZF lenses incorporate new technical advances from the ZEISS Ultra Prime®,
Master Prime® and DigiPrime® lenses for motion picture cameras. Results have been seen in feature films like
"Lord of the Rings", "Alexander", "King Arthur", "Air Force One", "Collateral", "King Kong" and many commercials and music clips."

In this video you can see a five parts that show the 5 f stops usable to show.
The focus is moved from the front Union Jack Bear
(measured focusing distance between the lens and the object is about 50 cm)
to the black/white stripy bear in the background
(measured focusing distance between the lens and the object is about 90 cm).
Those are the following useful f stops/apertures: f1.4, f2.0, f2.8, f4.0 and f5.6.
Unfortunately the f stops 8, 11 and 16 were unusable and dark to see at the small size of the
web video like 640x360 px. I cut it off all three. The video compression codec is Photo-JPEG 75%.
The file size is 49.7 MB, duration 33.15 sec.

The video "Two Bears" is scaled from 1080p to 640x360 px
and color corrected in Apple Shake 4
using "Truelight" color plug-in with the profile
"Kodak Vision Primer">>
>>display set for "rec709"
>>colour space set to "lin".
Than it was cut in FCP 5 and output to the file's current Photo-JPEG 75% codec.

Download is temporary open during the next 72 hours.

This test does not have any scientific purpose. It is about to inform only.

Jarred, thanks...so what can I say more...I am not a lens or camera specialist either...the test is a bit improvisation of the real one that will be done with the RED later this year...about the lens in particular I would say it is quite good and lens breathing problems during focusing could be at least tolerable if you could live with still lens limitations. It's a rock-solid mechanical construction to match and compete with Nikkor quality...in this new range of interchangeable lenses Zeiss claims the following:

Distagon T* 2,8/25 ZF has "Impressive sharpness",

Planar T* 1.4/85 ZF "Distortion is practically non-existent.",

Distagon T* 2/35 ZF - "High optical performance available across the frame throughout the focusing range.",

Below the text is Apple Mac OS X server's report that shows download of the Carl Zeiss Planar T* 1.4/50 ZF video test. Number of downloads are pretty good for this huge file of about 40 MB. I have an old and robust home server running on upgraded g3 to g4 machine. It works well.

The next test would be about the wide angle lenses. It should start with a mid wide vintage Nikkor N 1:2.8 f=24 mm Nippon Kogaku. The lens choice is also a subject to change without notice. Stay tuned.

The server report for "Two Bears" lens test.

"There is no point in having sharp images when you've fuzzy ideas."Jean-Luc Godard.

Dynamic range is, after all, the measurement between well saturation (photosite blowout) and noise floor.Thom Hogan